Java Backend Engineer

At TechBiz Global , we are providing recruitment service to our TOP clients from our portfolio. We are currently looking for a skilled Java Backend Engineer to join one of our clients' teams . You will play a key role in building an Applicant Tracking System (ATS) integrated with REST APIs and FIX APIs. You will work closely with product managers, architects, and front-end engineers to design, develop, and optimize scalable backend services for high-performance applications. Key Responsibilities * Design and implement backend services and APIs in Java (Spring Boot / Jakarta EE) for ATS functionality. * Develop and maintain RESTful APIs for integrations with external systems and internal services. * Implement and optimize FIX protocol-based APIs for financial/trading system integrations. * Ensure low-latency, high-availability, and secure backend architecture. * Write clean, maintainable, and well-documented code following industry best practices. * Collaborate with DevOps to deploy and monitor services in production environments (AWS, GCP, Azure, or on-prem). * Optimize database performance (SQL/NoSQL) and design schemas for ATS workflows. * Conduct code reviews, unit testing, and integration testing to maintain code quality. * Troubleshoot and resolve performance, scalability, and reliability issues. * Stay updated on emerging technologies, protocols, and best practices in API development and backend engineering. Requirements - Bachelor’s or Master’s degree in Computer Science, Engineering, or related field. - 3–5 years of professional experience** in backend development with Java. - Strong expertise in Spring Boot, Hibernate/JPA, and RESTful APIs. - Hands-on experience with FIX protocol (QuickFIX/J or similar libraries). - Solid knowledge of multithreading, concurrency, and low-latency system design. - Experience with databases (PostgreSQL, MySQL, MongoDB, Redis, etc.). - Proficiency in Git, CI/CD pipelines, Docker, Kubernetes. - Strong understanding of security principles (OAuth2, JWT, SSL, encryption). - Excellent problem-solving, debugging, and analytical skills. Nice to Have - Experience with financial systems, trading platforms, or ATS solutions. - Knowledge of messaging systems (Kafka, RabbitMQ, Redpanda, Chronicle Queue, etc.). - Exposure to cloud services (AWS/GCP/Azure). - Familiarity with microservices architecture and event-driven systems. Highlights Sao Paulo, Brazil Hybrid / remote work format Originally posted on Himalayas